Carbon shield



Dec. 19,1933. J. MILLER 1,940,364

CARBON SHIELD Filed March 30. 1931 2 Sheets-Sheet l iizyj Dec. 19, 1933. L MILLER 1,940,364

CARBON SHIELD Filed March 50, 1931 2 Sheets-Sheet 2 Patented Dec. 19, 1933 1,940,364

UNITED STATES PATENT OFFICE CARBON SHIELD Louis J. Miller, Chicago, Ill., assignor to United Autographic Register (30., Chicago, 111., a corporation of Illinois Application March 30, 1931. Serial No. 526,520 4 Claims. (01. 193F126) This invention relates particularly to dupliover the upper portions of the studs and eating machines adapted to the purpose of fillare guided thereby. A U-shaped clamping ing in forms on continuous-form stationery. member 18 is connected to the bar 16 by means The invention is more particularly adapted to of a pivot 19. A sheet 20, which is fastened 5 a machine comprising a bed equipped with a to the bar by means of the clamping member,

. plate-form platen, and a typewriter movably is of a thin flexible material, such as cellophane, mounted on the bed and adapted to the purcloth, cardboard, or the like. Preferably, the pose of typing in forms. sheet is rather stiff, so that it will not be dis- The primary object is to provide an improved placed or wrinkled when fresh stationery is 10 means for shielding certain areas of some of drawn over the platen and support from one the manifold slips so that those portions of the side of the platen will be sufiicient. The sheet writing will nct be transferred to underlying may be cut out so that only certain areas will slips. be shielded, and different sheets may be used In accordance with the present invention a to meet different requirements.

15 thin bar is supported at the edge of the platen In some cases it is desirable to block out and carries a sheet of shielding material of a similar areas of several slips which underlie desired shape which extends over the platen the carbon shield. In that case, a sheet of with the carbon-strips. hard cold rolled steel .015 of an inch in thick- The invention is illustrated in a preferred ness may be used. For ordinary use, however,

2 embodiment in the accompanying drawings, in where only one sheet is to be blocked out and which the type is to print through the shield to the Figure 1 is a side elevational view of a maunderlying slips, cellophane of .0015 thickness chine embodying the invention; Fig. 2, a broken has been found very satisfactory. transverse vertical sectional view taken as in- By reference to Figs. 2 and 3, it will be seen 25 dicated at line 2 of Fig. 1; Fig. 3, a broken that the sheet-supporting bar may be inserted 0 plan view of the machine; Fig. 4, a perspective between any of the carbon-strips so as to shield view of the sheet, supporting bar and clamp; as many copies asdesired. The bar, being rath- Fig. 5, a transverse sectional view of the device er light and freely mounted on the studs, will be taken as indicated at line 5 of Fig. 4; and Fig. supported primarily by the carbon strips and 30 6, an enlarged broken side elevational view will float between the strips and carbons. When showing one of the supporting studs taken as it is used in connection with carbon-strips from indicated at line 6 of Fig. 2. asupply-roll, the bar will assume lower posi- Referring to the drawings, A designates a tions on the studs as the expending of carbon main frame comprising a standard A and. a reduces the diameter of the roll.

35 bed A B, a platen mounted in the front por- In the illustration given, a single carbontion of said bed; C, a typewriting device movshield is shown attached to the left-hand side ably mounted on the rails which constitute the of the machine, but obviously shields may be atbed A of the machine; D, a carbon-supply detached to either or both sides of the machine, vice carried by the bed A E, a carbon-shield and several shields may be carried by one set 40 device carried by the supporting brackets of the of studs, if desired. carbon-supply device D; and F, a stationery The foregoing detailed description has been supply-roll. given for clearness of understanding only and no The front bracket 10 and the rear bracket 11 unnecessary limitations should be understood of the carbon-supply device are provided with therefrom, but the appended claims should be 5 stud-supporting arms 12 and 13, respectively, construed as broadly as permissible in view of which are rigidly connected to the brackets by the prior art. means of screws 14. Studs 15 are fixedly mount- What I regard as new, and desire to secure by ed on the supporting arms and disposed sub- Letters Patent, is: stantially perpendicular to the plane of the 1. In combination: a frame comprising spaced 5 carbon-strips extending towards the platen. horizontal arms and an intervening fiat platen The upper portion 15 of the stud 15 is of over which paper-webs may be drawn from the smaller diameter than the base portion and rear; means for supporting carbon-strips interprovides a shoulder near the central portion. leaved with and extending over the platen trans- A thin flat sheet-supporting bar 16 is provided versely of said p p d an upwardly 55 with holes 17 which are adapted to slip freely slidable impression-preventing carbon shield mounted outside of said frame near one lateral edge. of the paper webs and extending with the rbon-strips over a portion of the platen. 2. In a machine of the character set forth:

a airame comprising spaced arms and an intermovably engage said studs and float between said carbon strips.

4. In a machine of the character set forth: a frame having spaced arms and an intervening flat platen; a pair of outwardly extending brackets mounted on one of said arms and adapted to support a carbon-supply roll ifrom which carbon-strips may extend over said platen; upwardly extending studs mounted on said brackets near the marginal edges of said carbon-strips; and a carbon shield device interposed between said carbon-strips and extending over a portion of said platen, said device comprising a supporting bar having holes slidably engaging said studs, and an impression-preventing sheet fastened onto said supporting bar.

LOUIS J. MILLER. 

